Loose thread winding up and stretching device for automatic looms



`Ian. 22, 1957 N. BRUNNER 2,778,383

LOOSE THREAD WINDING UP AND STRETCHING DEVICE FOR AUTOMATIC LOOMS FiledFeb. 18, 1954 LoosE rrrREAD wiNDlNlG UP AND STRETCHING DEVICE FonAUTOMATIC LooMs Niklaus Brunner, Arbon, Switzerland, assignor to SocieteAnonyme Adolphe Saurer, Arbon, Switzerland, a jointstock company ofSwitzerland Application February 18, 1954, Serial No. 411,200

Claims priority, application Switzerland April 8, 1953 Claims. (Cl.139-260) This invention relates to automatic looms and more especiallyto a device for removing the loose piece of thread which extends duringthe pirn exchange between the fabric border and the shuttle.

It is an object of this invention to provide means serving this purposewhich are simple and can be fabricated at low cost.

In the device according to this invention a gripper serving to catch thepiece of thread cut oli near the end of the pirn can be moved from theposition of gripping towards a rotary member having afriction-increasing surface and forces the loose end of the threadagainst this member, to be held and stretched by it and, after cutting,be wound up upon it.

I prefer using a rotary member of cylindrical shape carrying bristlesand being rotated intermittently.

ln the drawings ailixed to this speciiication and forming part thereofan embodiment of this invention is illustrated diagrammatically by wayof example.

In the drawingsl Fig. 1 is a plan view of the device in which theshuttle box is shown as being arranged on the side where the pirns areexchanged.

Fig. 2 is another view of the power part of Fig. l with certain partsbeing removed to show the parts arranged below them.

Fig. 3 is a vertical section along the line Ill- III in Fig. l.

Referring to the drawings, 1 is the slay and 2 is an arm mounted on oneside of it and carrying the shuttle box 3 in which is shown a shuttle 4with a bobbin S in it. The weft thread 6 extends sideways of thethreader (not shown) along the shuttle towards the fabric border 7 where8 denotes the spreader, 9 being the shears. On the slay 1 is fixed anarm 10.

In bearings 13 mounted on the loom frame 12 is supported the adjustingrod 14 which, in a well known manner, is connected with the device (notshown) for starting the pirn exchange in the shuttle 4. The rod 14 hasmounted thereon an arm 15 which isconnected by means of a link 16 withthe arm 17 of a double-armed lever arranged on the arm 2li. Thisdouble-armed lever can be rocked in a plane which extends at leastapproximately normal to the shuttle race. The arm 18 has its lower endformed as a gripper 19, having a nose 23 and a baille 24. Thefunnel-shaped opening 22 between these two members ends in anenlargement 25.

On the loom frame 12 is further mounted the bracket 3i) gripping a bolt31. The double-armed lever 32 is mounted on this bolt 31 for rockingmovement. The bracket 30 is formed with a nose-shaped projection 33which forms an abutment for the pin 34 mounted on the short arm of thelever 32. A spring 35 extending between the loom frame 12 and the pin 34tends to turn the lever 32 around the bolt 31 in clockwise direction.Above the lever 32 is mounted the toothed disc 37 on which is fixed apin 38. On this pin rides the cylindrical Patented Jan. 22, 1957 ICC 2thread holder 41 which carries bristles 40 on its suirace. On thebracket 30 and also on the lever 32 are mounted pawls 42 and 43 forrotation about pins 44 and 45, respectively. The pawls 42 and 43 arepulled towards the toothed disc 374by means of springs 46 and 47,respectively. A cap 49 serves as a protector for the thread holderdrive.

The device here described operates as follows:

When the loom is in operation, the gripper 19 and the memberscooperating with it are in the position shown on the drawing in dashlines. During a pirn exchange the adjusting rod 14 is turned relative toFig. 3 in clockwise direction, thereby carrying the gripper 19 from itsposition shown in dash lines in Figs. 1 and 3 into the position shown infull lines, whereby the thread 6 extending from the fabric border 7 tothe bobbin 5 is carried through the opening between the nose 23 and thebaille 24 and is placed in the enlarged opening 25. While thereupon therod 14 is turned back in a well known manner in counter-clockwisedirection, it carries along, by way of the arm 15 and the link 16 thedoublearmed lever 17, 18 whereby the gripper 19 returns into its initialposition shown in dash lines, to remain in this position until the nextpirn exchange. During its return movement the gripper 19 pulls thethread 6 which had been cut oil near the shuttle 4, against the bristles40 of the thread holder and the thread 6 now extends in the positionshown in dot-and-dash lines.

As shown in Figs. l and 2, the arm lil, during the latter part of thestriking position of the slay 1, contacts the left-hand arm of the lever32 which is now turned in the counter-clockwise position and tensionsthe spring 35. The toothed disc 37 and the thread holder 41 mounted onit are prevented, by the action of the pawl 42, from being carried alongin the counter-clockwise direction. On the other hand, when the slay 1goes through its return movement, the spring 35 causes the lever 32 toturn and the pawl 43 causes the toothed disc 37 to turn in the clockwisedirection until the pin 34 meets the nose 33 on the bracket 3i). Thus,the thread holder 41 is turned only by the spring 35. After some shuttleflights the spreader shears 9 cuts the thread 6 near the fabric border 7so that the thread 6 is wound around the thread holder 41. The threadholder 41 can be lifted oil the disc 37 and another one mounted in itsplace, if desired.

I wish it to be understood that I do not desire to be limited to thedetails described in the foregoing speciilcation and shown in thedrawings, for obvious modifications will occur to a person skilled inthe art.

l claim:

l. A device for winding up and stretching the loose ends of the weftthread in automatic looms, comprising in combination a 'thread gripper,a rotary member with a roughened surface, means for moving said gripperwith the loose thread end toward and into contact with said member andto present said thread to said member in a position to be wound aroundit and be stretched and means for then cutting said stretched thread.

2. A device for removing the loose ends of the weft thread in automaticlooms, comprising in combination a thread gripper, a rotary cylindricalbrush with a roughened surface, means for moving said gripper with theloose thread end toward and into contact with said cylindrical brush andto present said loose end to said brush to be wound around saidcylindrical brush and be stretched and means for then cutting saidstretched thread.

3. A device for removing the loose ends of the weft thread in automaticlooms, comprising in combination a thread gripper, a rotary member witha roughened surface, means for intermittently moving said gripper Withthe loose thread end toward and into contact with said member so as topresent said loose end of said thread to said member to be wound aroundsaid member and be stretched and means for then cutting said stretchedthread.

4. The device of ciairn 1, in which means comprising a toothed disc anda pawl arranged for rotating said disc are provided to wind the threadonto said rotary member.

5. The device of claim 1, in which the gripper is a lever and the meansfor moving it are arranged to rock References Cited in the tile of thispatent UNITED STATES PATENTS 979,779 Marcure Dec. 27, 1910 1,808,127BanaganY June 2, 1931 1,967,510 Llewillyn July 24, 1934 FOREIGN PATENTS26,311 France Nov. 6, 1923

